Methods, systems, and devices are described for wireless communication at a UE. A base station may select a hybrid pilot configuration including a relatively sparse periodic pilot and a dense pilot embedded in one or more symbols of a low latency burst. A user equipment (UE) may generate a long term statistical average channel estimate based on the periodic pilot and an instantaneous channel estimate (e.g., for demodulation) based on the dense pilot embedded in the low latency burst. The UE may refine the instantaneous channel estimate by converting a control channel embedded with the burst. In some instances, the base station may embed the dense pilots in the first symbol of a burst and transmit subsequent low latency symbols with a reduced density pilot (or without pilot tones).
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method of wireless communication at a user equipment (UE), comprising: receiving a first set of pilot signals based at least in part on a periodic pilot transmission configuration; receiving a low latency burst comprising an embedded second set of pilot signals based at least in part on a burst pilot transmission configuration and comprising one or more control channel transmissions, wherein the burst pilot transmission configuration is different than the periodic pilot transmission configuration; and converting the one or more control channel transmissions into pilot data for demodulation of the low latency burst.
A user equipment (UE) receives wireless communication in a method that uses a hybrid pilot design. The UE receives a first set of pilot signals based on a periodic pilot transmission configuration (sparse pilots). The UE receives a low latency burst containing a second set of embedded pilot signals using a different burst pilot transmission configuration (dense pilots), and control channel transmissions. The UE converts the control channel transmissions into pilot data, which is used to demodulate the low latency burst. This combines periodic pilots for long-term channel estimation with dense burst pilots for low-latency demodulation.
2. The method of claim 1 , further comprising: generating a long term channel estimate based at least in part on the first set of pilot signals.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, also includes generating a long term channel estimate based on the first set of pilot signals (sparse periodic pilots). This long term estimate aids in demodulating subsequent bursts.
3. The method of claim 2 , further comprising: generating an instantaneous channel estimate based at least in part on the second set of pilot signals.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, and generates a long term channel estimate based on the first set of pilot signals, also includes generating an instantaneous channel estimate based on the second set of pilot signals (dense burst pilots). This gives a more immediate channel estimate.
4. The method of claim 3 , further comprising: demodulating the low latency burst utilizing the long term channel estimate and the instantaneous channel estimate.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, generates a long term channel estimate based on the first set of pilot signals, and generates an instantaneous channel estimate based on the second set of pilot signals, also includes demodulating the low latency burst utilizing both the long term channel estimate (from periodic pilots) and the instantaneous channel estimate (from burst pilots).
5. The method of claim 2 , further comprising: transmitting a channel state information message to a base station based on the long term channel estimate.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, and generates a long term channel estimate based on the first set of pilot signals, also includes transmitting a channel state information message to a base station based on the long term channel estimate. This provides feedback for link adaptation.
6. The method of claim 2 , further comprising: updating a tracking loop based at least in part on the long term channel estimate.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, and generates a long term channel estimate based on the first set of pilot signals, also includes updating a tracking loop based on the long term channel estimate. The tracking loop maintains synchronization with the base station signal.
7. The method of claim 1 , further comprising: refining a channel estimate based on the converted control channel.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, also includes refining a channel estimate based on the converted control channel.
8. The method of claim 1 , further comprising: receiving a subsequent low latency burst without pilots based on a subsequent burst transmission configuration.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, also includes receiving a subsequent low latency burst without pilots based on a subsequent burst transmission configuration. This reduces overhead in subsequent bursts.
9. The method of claim 1 , wherein the burst pilot transmission configuration comprises a set of pilot signals embedded based on a rank one transmission.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, has a burst pilot transmission configuration comprising a set of pilot signals embedded based on a rank one transmission. Rank one transmission indicates a single data stream.
10. The method of claim 1 , wherein the burst pilot transmission configuration comprises a set of pilot signals embedded based on a rank two transmission.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, has a burst pilot transmission configuration comprising a set of pilot signals embedded based on a rank two transmission. Rank two transmission indicates two data streams.
11. The method of claim 1 , wherein the burst pilot transmission configuration comprises a higher pilot density than the periodic pilot transmission configuration.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, has a burst pilot transmission configuration with a higher pilot density than the periodic pilot transmission configuration.
12. The method of claim 1 , wherein the embedded second set of pilot signals are demodulation pilot signals.
The wireless communication method described where a user equipment (UE) receives a first set of pilot signals based on a periodic pilot transmission configuration, receives a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converts the one or more control channel transmissions into pilot data for demodulation of the low latency burst, has embedded second set of pilot signals that are demodulation pilot signals.
13. A method of wireless communication at a base station, comprising: transmitting a first set of pilot signals based at least in part on a periodic pilot transmission configuration; embedding a second set of pilot signals in a low latency burst based at least in part on a burst pilot transmission configuration, wherein the burst pilot transmission configuration is different than the periodic pilot transmission configuration, wherein the low latency burst comprises one or more control channel transmissions; transmitting the low latency burst comprising the embedded second set of pilot signals; and transmitting a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration.
A base station uses a hybrid pilot design for wireless communication. The base station transmits a first set of pilot signals based on a periodic pilot transmission configuration (sparse pilots). The base station embeds a second set of pilot signals in a low latency burst using a different burst pilot transmission configuration (dense pilots). The low latency burst also contains control channel transmissions. The base station transmits the low latency burst with the embedded pilots. Finally, the base station transmits a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration.
14. The method of claim 13 , further comprising: selecting the burst pilot transmission configuration to comprise a higher pilot density than the periodic pilot transmission configuration.
The wireless communication method at a base station, where the base station transmits a first set of pilot signals based on a periodic pilot transmission configuration, embeds a second set of pilot signals in a low latency burst based on a burst pilot transmission configuration (different than the periodic pilot configuration), wherein the low latency burst comprises one or more control channel transmissions, transmits the low latency burst comprising the embedded second set of pilot signals, and transmits a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration, includes selecting the burst pilot transmission configuration to comprise a higher pilot density than the periodic pilot transmission configuration.
15. The method of claim 13 , further comprising: selecting the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank one transmission scheme.
The wireless communication method at a base station, where the base station transmits a first set of pilot signals based on a periodic pilot transmission configuration, embeds a second set of pilot signals in a low latency burst based on a burst pilot transmission configuration (different than the periodic pilot configuration), wherein the low latency burst comprises one or more control channel transmissions, transmits the low latency burst comprising the embedded second set of pilot signals, and transmits a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration, includes selecting the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank one transmission scheme.
16. The method of claim 13 , further comprising: selecting the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank two transmission scheme.
The wireless communication method at a base station, where the base station transmits a first set of pilot signals based on a periodic pilot transmission configuration, embeds a second set of pilot signals in a low latency burst based on a burst pilot transmission configuration (different than the periodic pilot configuration), wherein the low latency burst comprises one or more control channel transmissions, transmits the low latency burst comprising the embedded second set of pilot signals, and transmits a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration, includes selecting the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank two transmission scheme.
17. The method of claim 13 , wherein the embedded second set of pilot signals are demodulation pilot signals.
The wireless communication method at a base station, where the base station transmits a first set of pilot signals based on a periodic pilot transmission configuration, embeds a second set of pilot signals in a low latency burst based on a burst pilot transmission configuration (different than the periodic pilot configuration), wherein the low latency burst comprises one or more control channel transmissions, transmits the low latency burst comprising the embedded second set of pilot signals, and transmits a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration, has embedded second set of pilot signals that are demodulation pilot signals.
18. An apparatus for wireless communication at a user equipment (UE), comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory; wherein the instructions are executable by the processor to: receive a first set of pilot signals based at least in part on a periodic pilot transmission configuration; receive a low latency burst comprising an embedded second set of pilot signals based at least in part on a burst pilot transmission configuration and comprising one or more control channel transmissions, wherein the burst pilot transmission configuration is different than the periodic pilot transmission configuration; and convert the one or more control channel transmissions into pilot data for demodulation of the low latency burst.
A user equipment (UE) apparatus includes a processor and memory containing instructions for wireless communication using a hybrid pilot design. The UE receives a first set of pilot signals based on a periodic pilot transmission configuration (sparse pilots). The UE receives a low latency burst containing a second set of embedded pilot signals using a different burst pilot transmission configuration (dense pilots), and control channel transmissions. The UE converts the control channel transmissions into pilot data, which is used to demodulate the low latency burst.
19. The apparatus of claim 18 , wherein the instructions are executable by the processor to: generate a long term channel estimate based at least in part on the first set of pilot signals.
The user equipment (UE) apparatus described where instructions enable receiving a first set of pilot signals based on a periodic pilot transmission configuration, receiving a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converting the one or more control channel transmissions into pilot data for demodulation of the low latency burst, also includes instructions to generate a long term channel estimate based on the first set of pilot signals (sparse periodic pilots).
20. The apparatus of claim 19 , wherein the instructions are executable by the processor to: generate an instantaneous channel estimate based at least in part on the second set of pilot signals.
The user equipment (UE) apparatus described where instructions enable receiving a first set of pilot signals based on a periodic pilot transmission configuration, receiving a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, generating a long term channel estimate based on the first set of pilot signals, and converting the one or more control channel transmissions into pilot data for demodulation of the low latency burst, also includes instructions to generate an instantaneous channel estimate based on the second set of pilot signals (dense burst pilots).
21. The apparatus of claim 19 , wherein the instructions are executable by the processor to: transmit a channel state information message to a base station based on the long term channel estimate.
The user equipment (UE) apparatus described where instructions enable receiving a first set of pilot signals based on a periodic pilot transmission configuration, receiving a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, generating a long term channel estimate based on the first set of pilot signals, and converting the one or more control channel transmissions into pilot data for demodulation of the low latency burst, also includes instructions to transmit a channel state information message to a base station based on the long term channel estimate.
22. The apparatus of claim 18 , wherein the instructions are executable by the processor to: receive a subsequent low latency burst without pilots based on a subsequent burst transmission configuration.
The user equipment (UE) apparatus described where instructions enable receiving a first set of pilot signals based on a periodic pilot transmission configuration, receiving a low latency burst comprising an embedded second set of pilot signals based on a burst pilot transmission configuration (different than the periodic pilot configuration) and comprising one or more control channel transmissions, and converting the one or more control channel transmissions into pilot data for demodulation of the low latency burst, also includes instructions to receive a subsequent low latency burst without pilots based on a subsequent burst transmission configuration.
23. An apparatus for wireless communication at a base station, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory; wherein the instructions are executable by the processor to: transmit a first set of pilot signals based at least in part on a periodic pilot transmission configuration; embed a second set of pilot signals in a low latency burst based at least in part on a burst pilot transmission configuration, wherein the burst pilot transmission configuration is different than the periodic pilot transmission configuration, wherein the low latency burst comprises one or more control channel transmissions; transmit the low latency burst comprising the embedded second set of pilot signals; and transmit a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration.
A base station apparatus includes a processor and memory containing instructions for wireless communication using a hybrid pilot design. The base station transmits a first set of pilot signals based on a periodic pilot transmission configuration (sparse pilots). The base station embeds a second set of pilot signals in a low latency burst using a different burst pilot transmission configuration (dense pilots). The low latency burst also contains control channel transmissions. The base station transmits the low latency burst with the embedded pilots. Finally, the base station transmits a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration.
24. The apparatus of claim 23 , wherein the instructions are executable by the processor to: select the burst pilot transmission configuration to comprise a higher pilot density than the periodic pilot transmission configuration.
The base station apparatus described where instructions enable transmitting a first set of pilot signals based on a periodic pilot transmission configuration, embedding a second set of pilot signals in a low latency burst based on a burst pilot transmission configuration (different than the periodic pilot configuration), wherein the low latency burst comprises one or more control channel transmissions, transmitting the low latency burst comprising the embedded second set of pilot signals, and transmitting a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration, also includes instructions to select the burst pilot transmission configuration to comprise a higher pilot density than the periodic pilot transmission configuration.
25. The apparatus of claim 23 , wherein the instructions are executable by the processor to: select the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank one transmission scheme.
The base station apparatus described where instructions enable transmitting a first set of pilot signals based on a periodic pilot transmission configuration, embedding a second set of pilot signals in a low latency burst based on a burst pilot transmission configuration (different than the periodic pilot configuration), wherein the low latency burst comprises one or more control channel transmissions, transmitting the low latency burst comprising the embedded second set of pilot signals, and transmitting a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration, also includes instructions to select the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank one transmission scheme.
26. The apparatus of claim 23 , wherein the instructions are executable by the processor to: select the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank two transmission scheme.
The base station apparatus described where instructions enable transmitting a first set of pilot signals based on a periodic pilot transmission configuration, embedding a second set of pilot signals in a low latency burst based on a burst pilot transmission configuration (different than the periodic pilot configuration), wherein the low latency burst comprises one or more control channel transmissions, transmitting the low latency burst comprising the embedded second set of pilot signals, and transmitting a subsequent low latency burst without a set of pilot signals based on a subsequent burst pilot transmission configuration, also includes instructions to select the burst pilot transmission configuration to comprise a set of pilot signals embedded in a data symbol with a tone density in a frequency domain corresponding to a channel power delay profile (PDP) of the low latency burst for a rank two transmission scheme.
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May 7, 2015
June 6, 2017
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